Swiveled chair



G. W. HULL.

SWIVELED CHAIR.

APPLICATlON FILED oct. 25. 1920.

1,385,620. Patented July 26, 1921.

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UNITED STATES GEORGE W. HULL, OF SEATTLE, WASHINGTON.

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To all whom it may concern Be it known that I, GEORGE W. HULL, a citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Swiveled Chairs, of which the following is a specification.

The resent invention relates to improvements in swiveled chairs designed especially for use at lunch counters, in restaurants, department stores, or other-places where re- .Volving seats or swiveled chairs are lined up in rows at a counter, and the primary purpose of the invention is to provide such chairs with means which will insure a similar position for all of the chairs when they are not occupied.

To this end the invention contemplates the novel combination and arrangement of parts between the swiveled chair and its fixed base, whereby the chair will be returned to a certain, position when not occupied. And in this connection the invention is applicable not only in the manufacture of chairs, but the invention may be utilized for converting the ordina swiveled or revolving chair accordin to t e principles of the invention;

In t e accompanying drawings I have illustrated one example of the physical embodiment of my invention, in which the parts are combined and arranged according to the best mode I have so far devised for the practical application of the principles of my invention.

Figure 1 is a view showing a portion of a revolving or swivel chair, in which parts are shown in section for convenience of illustration.

Fig. 2 is a sectional viewpf the coupling head'detachedu In the preferred form of the invention illustrated in the drawings I have utilized a well-knownvtype of revolvin chair having the usual bottom 1, and a portlon of the back indicated at 2. Beneath the bottom 1 is the usual center post 3, and the well-known type of pedestal 4, which is fixed to the floor with its standard 5 shown in cross section. The

' revoluble portion of the chair is con led metal, and its body portion is cylindrical and provided with an upper taperin or conical annular shoulder 7, above w ich. the

Specification of Letters Patent.

Application flled'october as,

presses it so that the 1920. Serial 1V0. 419,484.

head is fashioned with a sleeve 8 reduced in Patented July 20, 1921.

diameter, and fashioned with a pair of complementary cam faces 9, 9. These faces are formed within the sleeve 8 and each face extends around the inner bore of the sleeve a distance of 180 forming the ends of an annular ledge or shoulder 10 within the sleeve which ends converge upwardly to the seat 11 in the sleeve.

The coupling head is attached to the stand ard 5 as shown in Fig. 1 where it will be seen that the head is of larger diameter than the standard 5, but the set screw or bolt 12 passing through the opening 13 in the coupling is turned tight against the standard, and holds the coupling head fixed on the standard. .Whenthe coupling head is placed on the standard the annular shoulder 7 will guide the head and center it on the standard 5, after which the bolt '12 is tightened to fix the head on the standard.

In the drawing Fig. 1 illustrates the invention applied to a swivel chair already in use, and as the couplin head elevates the chair body slightly, a t imble 14 is shown in the bottom of the pocket 15 in the standard,"to compensate for the presence of the coupling head. Thus the post 3 of-the chair is supported in the upper end of the sleeve 8 of the head while the tapered end 16 of the post is. adapted to fit within the tapered thimble 14, which forms a bearing for the coiled about the tapered end 16 of the post. The function of this spring is to hold the revolving part of the chair elevated as in Fig. 1, and in this positlon a' radially projecting pin 19 carried by the post 3 just above its shoulder 17 is seated in the recess or apex 11 of the two cam spaces 9, and in this manner the revoluble portion of the chair is prevented from being turned.

Thus assuming the chair in Fig. 1 to be in juxtaposition to a counter, and facing parallel with the longitudinal axis of the counter, or at right angles thereto, the chair is in o'- sition to be occupied, and it will be un erstood that the row of chairs at the counter are all facing in the same direction. When a person occupies the chair, his weight deend bearing in the thimble, and in this position the chair may be revolved, and the ocost has its taperedchair as desired. When the occupant arises.

. the. pin 19 will ride up one or the other of the two cams 9, as the movable part of the chair is lifted by the spring 18, and the chair will swing around until the pin 19 finds rest in the apex of the double cam 9, and here the chair is held. Thus it will be seen that as the chair is occupied, and depresse it is free to swing around as desired, the pin 19 rotating. unobstructed with the 0st 3; but the instant the depressing Weigli t is removed from the chair, the spring ard, a reduced sleeve on the coupling-head havmg a pair of interiorcam faces, a spring between the standard and the post, and a pin on the post to engage said cam faces as described.

18 will lift the chair, and regardless of its 2. Thecombination with the coupling head position, the pin 19 will ride around in frictional .contact with one of the cam faces 9 until the apex 11 is reached, thus stopping the movement of the chair;

As before stated the invention may be physically embodied while the chair is being manufactured, or chairs already in use may be converted into automatically. operating chairs according to my invention by equipping such chairs with the thlmble 14, and mterposing the spring 18 with the coupling head 6, and assembling the parts as shown in Fig. 1.

having a pair of interior cam faces, and the chair post havin a pin to engage said faces, and means for e evating the post to lock it against revolving motion.

3. The combination with the standard having a socket and a bearing thimble therein of a coupling head on the standard and provlded w1th a reduced sleeve portion having a pair of complementary conver 'n cam shoulders therein of a revoluble 0 air post having an annular shoulder and a pivot point, a spring between the annular shoulder and the upper edge of saidthimble and coiled about said point, and a radially projecting pin on the post adapted to either of said cam faces as described.-

In testimony whereof I afiix m signature.

GEORGE HULL.

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